Philips tda3603 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

TDA3603

Multiple voltage regulator with
switch

Preliminary specification
Supersedes data of 1995 Feb 16
File under Integrated Circuits, IC01

1995 Oct 04

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch TDA3603

FEATURES

• One VP state controlled regulator (regulator 2)

• Regulator 2, reset and ignition buffer operates during

load dump and thermal shutdown

• One control pin for switching regulator 1 and the power
switch

• Supply voltage range of −18 to +50 V (operating
from 9.75 V)

• Low reverse current of regulator 2

• Low quiescent current (when regulator 1 is switched off,

standby)

• Ignition input/output

• Reset output

• High ripple rejection

• Power switch.

PROTECTIONS

• Reverse polarity safe (down to −18 V without high
reverse current)

• Able to withstand voltages up to 18 V at the outputs
(supply line may be shortened)

• ESD protected on all pins

• Thermal protection

• Load dump protection

• Foldback current limit protection for regulators 1 and 2

• Delayed second current limit protection for the power

switch

• The regulator outputs and the power switch are DC
short-circuited safe to ground and V

.

P

GENERAL DESCRIPTION

The TDA3603 is a multiple output voltage regulator with a
power switch, intended for use in car radios with or without
a microcontroller.

It contains one fixed voltage regulator with a foldback
current protection (regulator 1) and one fixed voltage
regulator (regulator 2), intended to supply a
microcontroller, that also operates during load dump and
thermal shutdown.

There is a power switch with protections, operated by the
enable input.

The reset and ignition outputs can be used to interface by
the microcontroller. The reset signal can be used to call up
the microcontroller and the ignition output indicates
ignition voltage available.

The supply pin can withstand load dump pulses and
negative supply voltages.

Regulator 2 will be switched on at a supply voltage >6.5 V
and off at a voltage of regulator 2 <1.9 V.

ORDERING INFORMATION

TYPE NUMBER

TDA3603 SIL9MPF plastic single in-line medium power package with fin; 9 leads SOT110-1
TDA3603P HDIP18 plastic heat-dissipating dual in-line package; 18 leads SOT398-1

1995 Oct 04 2

PACKAGE

NAME DESCRIPTION VERSION

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch TDA3603

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

P

I

q

T

vj

Voltage regulators

V

REG1

V

REG2

V

drop(REG1)

Power switch

V

drop(sw)

I

M

supply voltage

operating 9.75 14.4 25 V
regulator 2 on note 1 2.4 14.4 25 V
jump start t ≤ 10 minutes −−30 V
load dump protection during 50 ms; t

≥ 2.5 ms −− 50 V

r

total quiescent current standby mode − 400 500 µA
operating virtual junction temperature −−150 °C

output voltage regulator 1 0.5 mA ≤ I
output voltage regulator 2 0.5 mA ≤ I

≤ 300 mA 8.65 9.0 9.35 V

REG1
REG2

≤ 30 mA;

4.8 5.0 5.2 V

VP= 14.4 V

drop-out voltage I

= 0.3 A; note 2 −−0.5 V

REG1

drop-out voltage Isw= 0.3 A; note 3 −−0.9 V
peak current t ≤ 10 ms 1.4 −−A

Notes

1. Minimum operating voltage, only if V

2. The drop-out voltage of regulator 1 is measured between VPand V

has exceeded 6.5 V.

P

REG1.

3. The drop-out voltage of the power switch is measured between VPand Vsw.

1995 Oct 04 3

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch TDA3603

BLOCK DIAGRAM

handbook, full pagewidth

V

P

(14.4 V)

V

1

4

en

POWER SWITCH

TEMPERATURE

&

PROTECTION

REGULATOR 2

LOAD DUMP

9

7

V

sw

(14.0 V/0.3 A)

REG2

(5 V/30 mA)

&

REGULATOR 1

TDA3603

l(ig)

8

V

IGNITION

BUFFER

6

ground

2

3

5

MBE231

REG1

(9 V/300 mA)

RES
(5 V)

V

O(ig)

Fig.1 Block diagram.

1995 Oct 04 4

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch TDA3603

PINNING

SYMBOL

V

P

SOT110-1

SOT398-1

1 1 supply voltage

DESCRIPTION

REG1 2 2 regulator 1 output
RES 3 3 reset output voltage (+5 V)

PIN

V
V

en
O(ig)

4 4 enable input voltage

5 5 ignition output voltage
GND 6 6 ground (0 V)
REG2 7 7 regulator 2 output
V

I(ig)

V

sw

8 8 ignition input voltage

9 9 power switch output voltage
i.c. − 10 to 18 can be connected to a heat spreader

handbook, halfpage

V

REG1

RES

V

V

O(ig)
GND

REG2

V

I(ig)

V

sw

1

P

2
3
4

en

5

TDA3603

6
7
8
9

MBE230

handbook, halfpage

V

REG1

RES

V

V

O(ig)
GND

REG2

V

I(ig)

V

P

en

sw

1
2
3
4
5

TDA3603P

6
7
8
9

MBE229

i.c.

18

i.c.

17
16

i.c.
i.c.

15

i.c.

14

i.c.

13

i.c.

12

i.c.

11

i.c.

10

Fig.2 Pin configuration for SOT110-1.

1995 Oct 04 5

Pins 10 to 18 can be connected to a heat spreader.

Fig.3 Pin configuration for SOT398-1.

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch TDA3603

FUNCTIONAL DESCRIPTION

The TDA3603 is a multiple output voltage regulator with a
power switch, intended for use in car radios with or without
a microcontroller. Because of low-voltage operation of the
car radio, low-voltage drop regulators are used.

Regulator 2 will switch on when the supply voltage
exceeds 6.5 V for the first time and will switch off again
when the output voltage of regulator 2 is below 1.9 V (this
is below an engine start). When regulator 2 is switched on
and the output voltage of this regulator is within its voltage
range, the reset output will be enabled (reset will go HIGH
via a pull-up resistor) to generate a reset to the
microcontroller. The reset cycles can be extended by an
external capacitor at the reset output (pin 3). The start-up
feature is built-in to ensure a smooth start-up of the
microcontroller at first connection, without uncontrolled
switching of regulator 2 during the start-up sequence.

When both regulator 2 and the supply voltage (V
are available, regulator 1 and the switch can be operated
by an enable input (pin 4).

> 4.5 V)

P

All output pins are fully protected. The regulators are
protected against load dump (regulator 1 will switch off at
supply voltages higher than 25 V) and short-circuit
(foldback current protection).
The switch contains a current protection which is delayed
for ≥10 ms (in short-circuit condition). During this time the
current is limited to 1.4 A (V

At supply voltages over 16.9 V the switch is clamped at

15.0 V (to avoid externally connected circuitry being
damaged by an overvoltage) and the switch will switch off
at load dump.

Interfacing with the microcontroller can be accomplished
by an ignition Schmitt-trigger and ignition output buffer,
(simple full/semi on/off logic applications).

The total timing of a semi on/off logic set is shown Fig.4.

≤ 18 V).

P

1995 Oct 04 6